v1.3

Podcast support!

I made some changes to spot-thing to support podcast episodes that are currently playing. This included a change to the spotify-web-api-node library that I'm using, there's an update in the readme about it but you can see it below as well.

It doesn't appear that this natively supports getting podcast episode information in getMyCurrentPlayingTrack so I updated it to include the querystring ?additional_types=episode in the request URL on line 1011 of spotify-web-api.js and now podcasts work.